add type info to datahandle

PyConf/python/PyConf/dataflow.py

@@ -145,6 +145,10 @@ class DataHandle(object):
     def force_location(self):
         return self._force_location
 
+    @property
+    def type(self):
+        return self._producer.type.getDefaultProperties()[self._key].type()
+
     def __repr__(self):
         return 'DataHandle({!r})'.format(self.location)
 

PyConf/python/PyConf/tests/test_algorithm.py

@@ -40,6 +40,8 @@ def test_init():
     producer2 = Algorithm(IntDataProducer)
     assert producer is producer2, "algorithms instantiation doesn't seem to be cached correctly"
 
+    assert producer2.OutputLocation.type == 'int'
+
     with pytest.raises(ConfigurationError):
         # same algorithms shouldn't have different names
         Algorithm(IntDataProducer, name="wurst")